Do not hardcode IPs so we do not miss new ones when recreating them

Really dummy change, but since I missed the IP changes, this will help in case of node replacement

generate-ipxe-image.sh

@@ -15,11 +15,11 @@ if [ ! -f /bin/syslinux ]; then
   echo "syslinux missing, please 'yum -y install syslinux'"
   exit 1
 fi
-nextserver="188.184.21.168"
+nextserver=$(getent hosts aims.cern.ch | awk '{ print $1 }')
 release="aimsprod"
 if [ $# -eq 1 ]; then
  if [ $1 == "test" ]; then
-   nextserver="188.184.82.64"
+   nextserver=$(getent hosts aimstest.cern.ch | awk '{ print $1 }')
    release="aimstest"
  else
    usage